Phonograph-needle-sharpening attachment



J. SILBERSTANG.

PHONOGRAPH NEEDLE SHARPENING ATTACHMENT. APPLICATION FILED mu. :5, 1920.

Patefited Aug. 10,1920.

INVENTOR JACOB SILBERS/TANG; OF NEW YORK, N. Y.

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I Specification of Letters Patent. Patented Aug, 192g Application filed January 15, 1920. serial No. 351,637.

To all whom it may concern:

Be it known that I, JAooB SILBERs'rANo, a citizen of the United States, and resident of New York cit in the county of New York, borough of anhattan, and State of New York, have invented certain new and useful Improvements in Phonograph-Needle- Sharpening Attachments, of which the following is a specification.

This invention hasv for its main object to provide a simple and easily operated mechanism adapted to be applied to any common form of phonograph for sharpening the phonograph needles. My improved device in its preferred form is so constructed that it may be readily applied to a machine without necessitating any alteration in the latter and may be operated by a rotating part of the machine. Obviously, the invention is not limited to any particular make or kind of phonograph. By the term phonograph I intend to include all analogous machines for recording or reproducing sounds and in which a pointed needle or stylus follows or makes grooves in the record or record blank.

As an important feature of my improved construction I provide a rotatable needle carrier having a drive wheel adapted to be moved into or out of frictional engagement with the rotatable table or'record support. As other features I provide means for holding the friction wheel in inoperative position or resiliently holding it in operative position and provlde means for holding and adjusting the grinder. Other features will be referred to hereinafter in connection with a detail description of a preferredembodiment.

In the accompanying drawingsto which reference is to be had,

Figure 1 is a top plan view of a preferred formof my attachment and on an enlarged scale; and

Fig. 2 is a side elevation.

In the specific form illustrated I provide a base 10 adapted to be secured to the casing of the phonograph adjacent to the rotatable record carrier or support 11. The base 10 may be secured in position in any suitable manner as, for instance, by means of screws extending through screw holes 12. The base has an upright or standard 13 supporting a laterally extending arm 14. This arm is mounted for rotation in a plane parallel to the plane of the record support 11 and has at its outer or free end a spindle 15 carrying a friction wheel 16 for perlphery of the record carrier. The design of the parts is such that the friction wheel 16 will lie in approximately the same plane as the record carrier and it will, therefore be evident that the parts may be designed to adapt the attachment to any particular make of phonograph or the parts may be made adjustable to adapt one attachment to a plurality of different makes or kinds of phonographs; The spindle 15 at its upper end terminates in a needle clamp. As a simple form of clamp, I provide the upper end of the spindle itself with a longitudinally extending needle receiving passage and a transverse slot forming clamping parts 17 A portion of the spindle is threaded to receive a clamping collar 18 which engages with a conical surface 19 to force the jaws together and clamp the needle 20 when the collar 18 is screwed down.

Pivotally secured to the spindle carr ing arm 14 and extending upwardly there rom engagement with the I is a grinder carrying arm 21. Mounted at the upper end of this arm is the grinder or sharpening device 22 which may be moved into or out of operative engagement with the. needle. In the specific form illustrated this grinder 22 is in the form of a cylindrical stone mounted to rotate on a pivot pin 23 in a holder 24. The holder is rigidly secured to the arm 21 by a clamping bolt or screw 25 which permitsof an adjustment of the holder .in respect to the arm. The clamping pivot screw 25 extends at right angles to the general direction of the stone pivot 23 so that adjustment about the pivot 25 keeps the axis of the stone in the same plane with the axis of the needle and spindle but permits the stone to engage with the needle at different angles to give the desired bevel to the needle point.

Suitable means are provided for resiliently holding the grinder against the needle during the sharpening operation and holding it away from the needle to facilitate insertion and removal of the needle. As shown, a spring 26 has one end secured to the arm. 21 and has a lower terminal portion 27 disposed at an angle to the lower edge of a recess in the arm 14. When the arm 21 is swung toward the left from the position shown in Fig. 2, this lower end of the sprin will enter the recess and press against t e flat side thereof so that there in the position shown in Fig. 2 the inclined lower end of the spring 26, in pressing toward the right, tends to move'downwardly and hold and, therefore, swing the arm 21 the grinder in resilient engagement with the end of the needle.v

The arm 15 is preferably provided with means for holding the friction wheel 16 out of engagement with the record carrier. This is shown in the form of a spring pressed locking pin 28 adapted to enter a recess orsocket in the upper end of the standard 13. A spring 29 normally presses this pin endwise and an outer head 30 facilitates the pulling out of the pin and the releasing of the arm 14 so that it may swing. A coil spring31 is shown as encircling the standard 13 and having one end secured to the base 10 and the other end secured to the arm 14. With the parts in normal position, the pin 28 is in the socket, the spring 31 is under compression and the friction wheel 16 is out of engagement with the record carrier 11. When it is desired to sharpen a needle, the needle is clamped in position on the spindle and the grinder is brought into operative position. The pin 28 is then pulled out by means of the head 30 and the spring 31 will incidentally swing the arm 14 until the friction wheel 16 is resiliently pressed against the record carrier and is rotated at high speed by the rotation of the carrier. When the sharpening operation is completed, the arm 14 may be swung away from the record carrier and against the tension of the spring 31 until the pin 28 comes opposite to the recess in the standard at which time it will automaticall enter this recess and lock the parts in position.

The device is simple in construction, inexpensive to manufacture and easy to operate. None of the parts require any expensive machining operations and all are so connected that they may be quickly assembled and adjusted. he device may be very easily attached to a phonograph by any one without the aid of any special tools, other than a screw driver, and when in position does not interfere with the free use of the phonograph nor does it extend up above the record table to a suflicient distance to interfere with the closing down of the top of the instrument. Various changes may be made in the construction without departing from the spirit of my invention. Various details of construction are comparatively unimportant, for instance, I have shown the friction'wheel 16 as formed of metal with a rubber tire or peripheral portion inserted in a groove in the metal part. This is unimportant as the entire wheel 16 may be made of fiber or any other construction may be employed to facilitate a proper frictional compact with the periphery of the record carrier 11.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A sharpening device for phonograph needles including a support, an arm pivoted thereto to swing about a vertical axis, a spindle mounted in said arm and having a needle clam and a friction wheel for engagement with the periphery of a phonograph record support upon the horizontal swinging of said arm and a grinder for operative engagement with the point portion of a needle.

2. A sharpening device .for phonograph needles including a support, an arm pivoted thereto, a spindle mounted in said arm and having a needle clamp and a friction wheel for engagement with the phonograph record support and a grinder carried by said arm.

3. A phonograph needle sharpening device including a rotatable spindle,a clamp for, holding a needle co-axial therewith, a friction wheel connected to said spindle, a grinder for engagement with the point portion of a needle and means for supporting said spindle and permitting the movement of said friction wheel into and out of engagement with a rotatable phonograph rec- 0rd support, said grinder being bodily movable with said means.

4. A device of the class described including a spindle having a phonograph needle clamp at one end and a friction wheel at the other, means engaging with said spindle intermediate of its ends and permitting the movement of said friction wheel into or out of engagement with a rotatable part of the phonograph and a grinder movable into and out ofoperative engagement with the point of a needle. i

5. A device of the class described including a pivoted arm, a phonograph needle clamp rotatably mounted thereon, a second arm pivotally secured to the first mentioned arm, a grinder carried by said second mentioned arm and means for rotating said spindle.

6. A device of the class described including a spindle, means for clamping a phonograph needle thereto in axial alinement therewith, an arm mounted to swing in a plane including the axle of said spindle, and a grinder carried by said arm and angularly adjustable in respect thereto in said plane.

7. A device of the class described including a spindle, means for clamping a phonograph needle thereto in axial alinement therewith, an arm mounted to swing in a plane including the axle of said spindle, a grinder carried by said arm and angularly adjustable in respect thereto in said plane and a friction wheel secured to said spindle Ill and movable therewith into and out of operative engagement with a rotatable phonograph record support.

8. A device of the class described including a substantially vertical supporting member, an arm pivotally mounted thereon, a friction wheel carried by said wheel, a spring normally tending to swing said arm about said support to bring said friction wheel into engagement with a rotatable phonograph record support, locking means normally tending to prevent said swinging movement, a phonograph needle holder secured to and co-axial with said friction wheel and a grinder movable into and out of operative 15 engagement with the needle.

9. A device of the class described including a pivotally mounted arm, a rotatable needle clamp carried thereby, a second arm pivotally mounted on said first mentloned 20 arm, a rotatable grinder and a holder for said grinderadjustably secured to said second mentioned arm.

Signed at New York cit in the county of New York and State of ew York this 14 25 day of January, A. D. 1920.

JACOB SILBERSTANG. 

